Dec 19 16:42:11.425 INFO checking gannonchan/var_study against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 16:42:11.425 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-5/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/gannonchan/var_study:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 16:42:12.041 INFO [stdout] d9cd94524add632ff952c907a2d207c7363ed850b94c0164afc9647fa1e2a83f
Dec 19 16:42:12.043 INFO running `"docker" "start" "-a" "d9cd94524add632ff952c907a2d207c7363ed850b94c0164afc9647fa1e2a83f"`
Dec 19 16:42:13.660 INFO [stderr]     Checking var_study v0.1.0 (/opt/crater/workdir)
Dec 19 16:42:14.128 INFO [stderr] warning: unused variable: `first_name`
Dec 19 16:42:14.129 INFO [stderr]   --> src/main.rs:23:9
Dec 19 16:42:14.129 INFO [stderr]    |
Dec 19 16:42:14.129 INFO [stderr] 23 |     let first_name = String::from("0");
Dec 19 16:42:14.129 INFO [stderr]    |         ^^^^^^^^^^ help: consider using `_first_name` instead
Dec 19 16:42:14.129 INFO [stderr]    |
Dec 19 16:42:14.130 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 16:42:14.130 INFO [stderr] 
Dec 19 16:42:14.130 INFO [stderr] warning: unused variable: `last_name`
Dec 19 16:42:14.130 INFO [stderr]   --> src/main.rs:24:9
Dec 19 16:42:14.130 INFO [stderr]    |
Dec 19 16:42:14.131 INFO [stderr] 24 |     let last_name = String::from("张三");
Dec 19 16:42:14.131 INFO [stderr]    |         ^^^^^^^^^ help: consider using `_last_name` instead
Dec 19 16:42:14.131 INFO [stderr] 
Dec 19 16:42:14.131 INFO [stderr] warning: unused variable: `f`
Dec 19 16:42:14.131 INFO [stderr]   --> src/main.rs:73:9
Dec 19 16:42:14.132 INFO [stderr]    |
Dec 19 16:42:14.132 INFO [stderr] 73 |     let f = match f {   //使用match判断打开文件是否出现错误
Dec 19 16:42:14.132 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 19 16:42:14.132 INFO [stderr] 
Dec 19 16:42:14.132 INFO [stderr] warning: unused variable: `f`
Dec 19 16:42:14.133 INFO [stderr]   --> src/main.rs:95:9
Dec 19 16:42:14.133 INFO [stderr]    |
Dec 19 16:42:14.133 INFO [stderr] 95 |     let f = File::open("d:\\hello.txt").unwrap();
Dec 19 16:42:14.133 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 19 16:42:14.134 INFO [stderr] 
Dec 19 16:42:14.134 INFO [stderr] warning: unused variable: `f`
Dec 19 16:42:14.134 INFO [stderr]   --> src/main.rs:97:9
Dec 19 16:42:14.134 INFO [stderr]    |
Dec 19 16:42:14.134 INFO [stderr] 97 |     let f = File::open("d:\\hello.txt").expect("打开文件发生错误！");
Dec 19 16:42:14.134 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 19 16:42:14.134 INFO [stderr] 
Dec 19 16:42:14.157 INFO [stderr] warning: unused variable: `first_name`
Dec 19 16:42:14.158 INFO [stderr]   --> src/main.rs:23:9
Dec 19 16:42:14.158 INFO [stderr]    |
Dec 19 16:42:14.158 INFO [stderr] 23 |     let first_name = String::from("0");
Dec 19 16:42:14.158 INFO [stderr]    |         ^^^^^^^^^^ help: consider using `_first_name` instead
Dec 19 16:42:14.158 INFO [stderr]    |
Dec 19 16:42:14.158 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 16:42:14.158 INFO [stderr] 
Dec 19 16:42:14.158 INFO [stderr] warning: unused variable: `last_name`
Dec 19 16:42:14.158 INFO [stderr]   --> src/main.rs:24:9
Dec 19 16:42:14.158 INFO [stderr]    |
Dec 19 16:42:14.158 INFO [stderr] 24 |     let last_name = String::from("张三");
Dec 19 16:42:14.158 INFO [stderr]    |         ^^^^^^^^^ help: consider using `_last_name` instead
Dec 19 16:42:14.158 INFO [stderr] 
Dec 19 16:42:14.160 INFO [stderr] warning: unused variable: `f`
Dec 19 16:42:14.160 INFO [stderr]   --> src/main.rs:73:9
Dec 19 16:42:14.160 INFO [stderr]    |
Dec 19 16:42:14.160 INFO [stderr] 73 |     let f = match f {   //使用match判断打开文件是否出现错误
Dec 19 16:42:14.160 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 19 16:42:14.160 INFO [stderr] 
Dec 19 16:42:14.164 INFO [stderr] warning: unused variable: `f`
Dec 19 16:42:14.164 INFO [stderr]   --> src/main.rs:95:9
Dec 19 16:42:14.164 INFO [stderr]    |
Dec 19 16:42:14.164 INFO [stderr] 95 |     let f = File::open("d:\\hello.txt").unwrap();
Dec 19 16:42:14.164 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 19 16:42:14.164 INFO [stderr] 
Dec 19 16:42:14.164 INFO [stderr] warning: unused variable: `f`
Dec 19 16:42:14.164 INFO [stderr]   --> src/main.rs:97:9
Dec 19 16:42:14.164 INFO [stderr]    |
Dec 19 16:42:14.164 INFO [stderr] 97 |     let f = File::open("d:\\hello.txt").expect("打开文件发生错误！");
Dec 19 16:42:14.165 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 19 16:42:14.165 INFO [stderr] 
Dec 19 16:42:14.228 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.60s
Dec 19 16:42:15.500 INFO running `"docker" "inspect" "d9cd94524add632ff952c907a2d207c7363ed850b94c0164afc9647fa1e2a83f"`
Dec 19 16:42:15.766 INFO running `"docker" "rm" "-f" "d9cd94524add632ff952c907a2d207c7363ed850b94c0164afc9647fa1e2a83f"`
Dec 19 16:42:16.109 INFO [stdout] d9cd94524add632ff952c907a2d207c7363ed850b94c0164afc9647fa1e2a83f